Type-writing-machine ribbon operating and feeding mechanism.



J. ALEXANDER.

TYPE WRITING MACHINE RIBBDN OPERATING AND FEEDING MEOHANISM.

APPLICATION FILED JUNI; s, 1912.

1,048,267, Patented Deo. 24, 1912.

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wmvessfs' J. ALEXANDER.

`TYPE WRITING MACHINE RIBBON OPERATING AND FEEDING MBCHANISM.

APPLICATION FILED JUNE a, 1912.

1,048,267. Patented Dec.24,1912.

3 SHEETS-SHEET 2.

WITNESSES INVENT l? Afro/Mfr J. ALEXANDER.

TYPE WRITING MACHINE RIBBON OPERATING AND FEEDING MBGHANISM.

APPLICATION FILED JUNE e, 1912.

1,048,267. l Patented Dec. 24, 1912.

3 SHEETS-SHEET 3.

WIT/VESSES INVENTO? Q/uJ/e randa UNITED sTATEs PATENT oEEicE.

JESSE ALEXANDER,` 0F NEW YORK, N. Y., lASSIGNOR OF ONE-HALF T0 EDWARD J'. GALLAGHER, 0F PITTSTON, PENNSYLVANIA.v

TYPE-WRITING-MACHINE RIBBON OPERATING AND FEEDING MECHANISM.

Specification of Letters Patent. Application filed June 8i,

1912. Serial No. 702,392.

Feeding Mechanism, of which the following is a specification. i

My. invention relates particularly to mech-y anism for use in the so called front stroke y or visible writing machine type.

Thel object is "to provide asimple and reliable constriiction-for feeding the ribbon step by step, reversing the directionof feed when desired and vibrating the ribbon in front of the printing point at each printing stroke. I

Figure 1, is a longitudinal section and side elevation illustrating mechanism embodying my invention and showing the ribbon oscillating or vibrating mechanism. Fig. 2, 1s a plan view and partial section illustrating my invention. Fig. 3, is a longitudinal section and side elevation showing the ribbon feeding mechanism. Fig. 4, is a perspective view showing part of the ribbon feeding mechanism.

The key and type bar actinn herein illustratedjs claimed in an accomlianving applica tion but willbe briefly described. The key lever 1 is pivoted at 2 and guided by the cemb 3. The type bar 4 is pivoted at 5 in the type bar segment 6 and its head is adapted to rest on the ledge 7. The sub-lever 8 pivoted at 9 is connected to the key lever by a spring 10 and a link 11, the latter having a pin and slot connection 12 and a sliding connection at 13 with the key lever. The link 14 is connected at 15 to the sub-lever and has a slot 16 for the pin 17 on the type bar and an end 18 for engaging the shoiilder 19 of the type bar at the beginning of the stroke. The escapement rocker 27 is pivoted at 28 and normally under tension of the adjustable spring 29. The universal bar 30 beneath the key lever is connected by the link 31 to the rocker arm 32. The lever 33 is connected at 34 to the arm 32 and at 35 to the lower end of the ribbon vibrating guide 36. A toothed rack 37 carried by the carriage construction is preferably pivoted and adapted to' be retracted by a finger-lever 38.

The ribbon 39 is carriedv by two spools in front of the platen 40 and uided by the vibrator 36. Whenever a liyey lever is depressed the universal bar 30 is depressed, the arm 32 drawn down, the lever33 tilted and the Ivibrator 36 raised with the ribben in front of the printing position just before the type bar reaches the printing point. On opposite sides of the machine are levers such as 41 connected by links 42 to the universal bar,30. Each ribbon spool 43 is mounted lower end. A pawl 46 guided by a pin 47 is connected to the vertical arm of the lever 41 and has its forward end 48 adapted to engage the ratchet 45 when moving forwardly so as to feed the ratchet and ribbon. A spring pawl 49 has one end located adjacent the end 48 of the `feeding pawl 46 and is adapted to hold the ratchet 45 from backward movement. The rod 50 extending transversely of the machine in back of the type bar segment is held in its position by a spring 31 in a notch 52. The rod 50 has another notch 53 into which the spring 51 is adapted to snap when the rod 50 is pushed to the left. The rod 50 has two arms 54 and 55 which project upwardly' along the sides of the corresponding feeding pawls so that when the rod is in the psition shown in Fig. 2 the right hand feeding pawl is held out of engagement with the correspondis in operative engagement with its ratchet.. By shifting the rod 50 to the left,` the right hand feeding pawl and brake pawl are allowed to come into operative enga ement with its ratchet while the lefthand l ceding pawl and brake are forced out of engagement with the left hand ratchet. The direction of feed of the ribbon is therefore reversed.

What I claim is 1. In a typewriter ribbon mechanism, auniversal bar extending beneath the key levers, a. vibrating ribbon guide operatively connected with said universal bar and levers pivoted at the sides of the machine operatively connected with said universal bar,

nected to said levers for operating said ratchets. i

levers, levers pivotedto the sides of the machine and having links connected to said ing ratchet while the left hand feeding pawl" ribbon feeding ratchets and pawls cen-v` Patented Dec. 24, 1912.

on a shaft 44 having a ratchet 45,at its 2 In a typewriter ribbon mechanism, a universal bar extending beneath the key universal bar extending levers,` .levers pivoted' to ratchet directly connected with said side levers for operating said ratchets.

3. In a typewriter ribbon mechanism,

beneath the key the sides of the, machine and having links `connected to said universal bar, ribbon ratehets on opposite sides of the machine, yielding pawls directly connected with said vside levers for operating said ratchets and a reversing rod having arms projecting along side the said pawls.

4. A typewriter ribbon mechanism, com prising ya verticalv ribbon spool shaft, a ratchet carried thereby, a spring brake pawl-secnred at a point in front of said ratchet and 'extending along the outer side thereol and a yielding feeding pawl exl tending rearwardly of said ratchet and movable in a horizontal plane at the side of the machine means for `oscillatingsaid feeding pawl.

5. A typewriter ribbon mechanism, comprisingvertical ribbon spool shafts, a carried thereby, a spring brake pawl Gopies et this patent maygbe obtained for and universal bar operated mentioned lever.

secured at a point in front of said ratchet and extending along the outer side thereof and a yielding feeding pawl extending rearwardly horizontal plane at the side of the machine and universal bar operated means for oscillating. said pawl, said brake pawl having one end `extending along side of the end of said feeding pawl and a reversing rod for moving from its ratchet vtogether with spending brake pawl.

a'typewriter ribbon mechanism, 4a feeding ratchet mounted on a vertical axis, a. lever pivoted at the side of the machine and having a verticalarm and a horizontal arm, a pawl connected atits rear end. to a vertical arm of said lever and having aA guide adjacent its forward end, a universal bar extending beneath the key levers and a the corre# link` connecting the end of' said universal.

bar 'to the horizontal' arm of said first JESSE ALEXANDER. Witnesses: v .a

DAvID' M. EDsALL, E. J GALLAGHER.

Commissioner of Patent-s.

of said ratchet and movable in Val said feeding pawl laterally avv-ay' A 

